Eight people were injured when a Southwest plane rolled off the runway after landing at Nashville International Airport on Tuesday afternoon.

Flight 31 from Houston Hobby Airport to Nashville went off a taxiway around 5:20 p.m. as it approached the arrival gate, Southwest Airlines spokeswoman Emily Samuels said in an email, according to The Associated Press.

She said the 133 passengers and five crew members evacuated the plane safely and were bused to the terminal where employees were helping them.

Federal Aviation Administration spokeswoman Kathleen Bergen said the Boeing 737 rolled into grass and got stuck. She said the FAA is investigating.

News media outlets quote fire department spokesman Brian Haas as saying eight people were transported to a hospital, most with minor injuries and one with chest pain.

No information about what caused the aircraft to leave the runway was immediately available.